- Very sharp in the center area
- Distortion is well controlled if used carefully
- Wider than the 17-40 and you see the different the 2mm makes
- The built quality is quite good, being Sigma's EX series of lenses
- Flare is well controlled for a lens this wide
- Price is about half of what you would expect to pay for the Canon 17-40mm f4L
- Far edges are blurry
- Sigma colour has never been my cup of tea
- Exposed bulging front element
- Can not take front mounted filters without vignetting
- Non Ultrasonic focus motor
One of the many roller-coaster rides in Canada's Wonderland -- 5D & Sigma 15-30mm. Larger Picture.
The Cyclone. Only the crazy will ride something like this :) -- 5D & Sigma 15-30mm. Larger Picture.
Xtreme Skyflyer. Can't imagine myself doing this -- 5D & Sigma 15-30mm. Larger Picture.